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A143875
Number of ways of placing kings with no more than 2 mutual attacks on an n X n chessboard.
4
1, 2, 11, 155, 3280, 124511, 7623993, 795923016, 140176308483, 42642616703815
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..9.
CROSSREFS
Cf.
A143870
,
A143881
,
A143886
.
Cf.
A143876
,
A143877
,
A143878
,
A143879
,
A143880
.
Sequence in context:
A227328
A287149
A188684
*
A245054
A058154
A275923
Adjacent sequences:
A143872
A143873
A143874
*
A143876
A143877
A143878
KEYWORD
nonn
,
more
,
hard
AUTHOR
R. H. Hardin
, Sep 04 2008
STATUS
approved
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Last modified September 16 17:53 EDT 2024. Contains 375976 sequences. (Running on oeis4.)